INTEGRATED REMOTE-SENSING TECHNIQUES TO STUDY AEROSOLS, CLOUDS, AND THEIR INTERACTION
Ulla Wandinger, Patric Seifert, Janet Wagner, Ronny Engelmann, Johannes Bühl, Jörg Schmidt, Birgit Heese, Holger Baars, Anja Hiebsch, Thomas Kanitz, Dietrich Althausen, Albert Ansmann
Leibniz Institute for Tropospheric Research, Permoserstrasse 15, 04318 Leipzig, Germany
We present an overview of combined remote-sensing techniques to study aerosol and cloud processes in the troposphere. Advanced multiwavelength Raman lidars with polarization, multiple-field-of-view, water-vapor, and temperature measurement capabilities in synergy with Doppler lidar, cloud radar, and passive remote-sensing instruments such as sun photometer and microwave radiometer allow an in-depth investigation of aerosols and clouds, together with the properties of the atmospheric environment in which they develop and interact. Novel synergistic algorithms afford the retrieval of microphysical parameters of aerosol particles and hydrometeors. Applied in dedicated field campaigns and large-scale networks such as the European Aerosols, Clouds, and Trace gases Research InfraStructure Network ACTRIS, the combined observational techniques provide new insight into complex interaction processes of aerosols, clouds, and atmospheric dynamics.
S3O-09
ALGORITHM AND SOFTWARE FOR THE RETRIEVAL OF VERTICAL AEROSOL PROPERTIES USING COMBINED LIDAR/RADIOMETER DATA: DISSEMINATION IN
EARLINET
Anatoli Chaikovsky1, Oleg Dubovik2, Philippe Goloub2, Didier Tanré2, Gelsomina Pappalardo3, Ulla Wandinger4, Ludmila Chaikovskaya1, Sergei Denisov1, Yan Grudo1, Anton Lopatsin1,2, Yana Karol1,2, Tatyana Lapyonok2, Michail Korol1, Fiodor Osipenko1, Dzmitry Savitski1, Alexander Slesar1, Arnoud Apituley5, Lucas Alados Arboledas6, Ioannis Binietoglou3, Panayotis Kokkalis7,
María José Granados Muñoz6, Alexandros Papayannis7, Maria Rita Perrone8, Aleksander Pietruczuk9, Gianluca Pisani10, Francesc Rocadenbosch11, Michaël Sicard11, Ferdinando De Tomasi8,
Janet Wagner4, Xuan Wang10
1Institute of Physics, NAS of Belarus, 68, Nezalezhnosty ave., 220072, Minsk, Belarus
2LOA, Universite de Lille, Lille, France
3Consiglio Nazionale delle Ricerche - Istituto di Metodologie per l'Analisi Ambientale (CNR IMAA), Potenza, Italy
4Leibniz Institute for Tropospheric Research, Leipzig, Germany
5KNMI - Royal Netherlands Meteorological Institute, The Netherlands
6Andalusian Center for Environmental Research (CEAMA), University of Granada – Autonomous Government of Andalusia, Granada, Spain
7National Technical University of Athens, Department of Physics, Athens, Greece
8Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia (CNISM ) and Universita' del Salento,Lecce, Italy
9Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland
10Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Napoli, Italy
11Universitat Politθcnica de Catalunya, Barcelona, Spain
Ten combined lidar and sun-radiometer stations in the European Aerosol Research Lidar Network (EARLINET) have been testing technique and software for retrieving aerosol microstructure parameters from coordinated lidar and sun-radiometer data with the aim of creating new type of routing cooperative observations. The paper presents description of a program package and preliminary results of testing measurements at some stations.
S3O-10
EVALUATION OF A COMBINED LIDAR AND SUNPHOTOMETER RETRIEVAL ALGORITHM TO DETERMINE AEROSOL MICROPHYSICAL PROPERTIES Janet Wagner1, Ulla Wandinger1, Albert Ansmann1, Patric Seifert1, Anatoli P. Chaikovsky2
1Leibniz-Institut f¨ur Troposph¨arenforschung, Leipzig, Germany
2Institute of Physics, National Academy of Science, Minsk, Belarus
To assess information about the optical, microphysical, and radiative properties of aerosol particles the lidar techniqueand sunphotometers are commonly used. Informationthat result from both lidar and sunphotometerdata can provide a distinct image of the vertical aerosolproperties. The algorithm developd at the Institute ofPhysics of the National Academy of Science of Belarus (IPNASB) uses lidar measurements at the three wavelengths 355, 532, and 1064 nm and mean backscatter andextinction coefficients retrieved from radiometric data toobtain profiles of fine-mode and coarse-mode concentrations.At IfT Leipzig the IPNASB algorithm was testedfor specific aerosol situations. The case of a strong Saharandust outbreak in May 2008 is presented. The obtainedbackscatter and extinction profiles are in accordance withprofiles determined with the Klett method. Values of thelidar ratio, the Ångström exponent, and the particle depolarizationratio agree well with the results of differentstudies. It can be concluded that the retrieved concentrationprofiles of fine-mode and coarse-mode particlescontain reliable information about the amount and typeof aerosols in different height ranges.
RETRIEVING FINE AND COARSE MODE EXTINCTION COEFFICIENT PROFILES FROM LIDAR AND SUNPHOTOMETRY SYNERGY
David Daou1, Norman T. O'Neill1, Kevin Strawbridge2, Michael Travis2
1CARTEL, Université de Sherbrooke, Sherbrooke, Québec, J1K 2R1, Canada
2Environment Canada, 6248 Eighth Line, R.R. #1, Egbert, Canada
Backscatter lidar profiles from the CORALNet lidar network and aerosol optical depths (AODs) from the AEROCAN / AERONET network were acquired during the summer of 2009 at two different locations Egbert (Ontario) and Sherbrooke (Québec). We introduce a technique for retrieving total, fine and coarse mode extinction coefficient profiles from lidar backscatter coefficient profiles and sunphotometry retrievals. The sunphotometry retrievals are employed to estimate the intensive parameter of lidar ratio and hence the extinction coefficient profiles for all three aerosol modes. Preliminary results show a degree of physical coherency in the retrievals accompanied by various artifactual problems.
S3O-12
AEROSOL SPATIAL DISTRIBUTION DURING DRAGON EXPERIMENT AS SEEN BY A MOBILE GROUND-BASED LIDAR-SUNPHOTOMETER SYSTEM PRELIMINARY RESULTS
Augustin Mortier1, Philippe Goloub1, Brent Holben2, Thierry Podvin1, Luc Blarel1, Christian Verwaerde1, Yana Karol1,3, Ilya Slutsker2, Jean-Yves Balois1, Didier Tanre1, Timothy Berkoff4,
Stephane Victori5, Richard Mathieu5
1LOA, Université de Lille, UFR de Physique, 59655 Villeneuve d’Ascq, France
2GSFC/NASA, Greenbelt, MD 20771, USA
3Institute of Physics, NAS of Belarus, 68, Nezalezhnosty ave., 220072, Minsk, Belarus
4Univ. of Maryland Baltimore County, NASA-GSFC, Greenbelt, Maryland 20771, USA
5CIMEL Electronique, Paris, France
The DRAGON (Distributed Regional Aerosol Gridded Observation Networks)-USA experiment was held during summer 2011 in the Baltimore/ Washington region and operated in conjunction with NASA’s DISCOVER-AQ campaign. A network of 40 AERONET sun-photometers was deployed during field activities that included overflights by two different research aricraft during the month of July. In this context, a ground-based mobile LIDAR-sunphotometer developed by LOA and operated jointly with GSFC performed several transects through Baltimore/Washington DC area. The paper presents preliminary results of aerosol spatial and temporal variability as retrieved from mobile ground-based LIDAR-sunphotometer observations.
S3O-13
OPTICAL AND MICROPHYSICAL PROPERTIES FROM RAMAN LIDAR AND DEPOLARIZATION DATA
Christine Böckmann1, Lukas Osterloh1, Tom Rother2, Ilya Serikov3, Holger Linne3, Stefan Kinné3
1Institute of Mathematics, Potsdam University, Am Neuen Palais 10, 14469 Potsdam, Germany,
2German Aerospace Center (DLR), Remote Sensing Technology Institute, Neustrelitz, Germany
3MPI-Meteorology, Bundesstrasse 53, 20146 Hamburg, Germany
First, we propose a two-dimensional model to retrieve spheroidal particle distributions, depending not only on the size parameter but also on the aspect ratio, and microphysical particle properties from Raman lidar and depolarization profiles in contrast to conventional procedures. Since the problem is ill-posed in nature we use an appropriate iterative regularization technique. Second, this method is applied to a measurement scenario of Saharan dust from the Barbados lidar station which shows good results, in particular, in using additionally depolarization profiles. Two-dimensional (2D) volume distribution and microphysical properties are retrieved via inversion.
S3O-14
RETRIEVAL OF HEIGHT-TEMPORAL DISTRIBUTIONS OF PARTICLE PARAMETERS FROM MULTI-WAVELENGTH LIDAR MEASUREMENTS DURING DISCOVER-AQ 2011
CAMPAIGN
Igor Veselovskii1, David N. Whiteman2, Alexey Kolgotin1, Michael Korenskiy1, Daniel Perez-Ramirez2,3
1Optosystems, Physics Instrumentation Center, Troitsk, Moscow Region, 142190, Russia
2Mesoscale Atmospheric Processes Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
3Applied Physics Department, University of Granada, 18071, Granada, Spain
An algorithm for linear estimation (LE) of aerosol bulk properties such as particle volume and complex refractive index from multiwavelength lidar measurements was applied to the results obtained during the DISCOVER-AQ 2011 campaign. As an example, the retrieval of time-sequences of the bulk particle parameters on the night of 21 June 2011 is given. The particle volume density shows strong variation while the effective radius remains approximately constant at a value of 0.2 µm. The real part of the refractive index shows a slight decreasing tendency in the region of enhanced extinction coefficient, which could be due to the uptake of water by the particles. The retrieved values of effective radius and complex refractive index are in a good agreement with the results provided by AERONET.
S3O-15
GEOMETRICAL, OPTICAL AND MICROPHYSICAL PROPERTIES OF ATMOSPHERIC AEROSOLS IN NORTHERN INDIA
Elina Giannakaki1,2, Tero Mielonen1, Kimmo Korhonen1, Heikki Lihavainen3, Anti-Pekka Hyvärinen3, Detlef Müller4,5,6, Holger Baars4, Ronny Engelmann4, Dietrich Althausen4, T.S. Panwar7, Rakesh Hooda3,7, Ved Prakash Sharma7, Kari E. J. Lehtinen1,8, Yrjö Viisanen3 and Mika Komppula1
1Finnish Meteorological Institute, Kuopio Unit, Kuopio, FI-70211, Finland
2Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Greece
3Finnish Meteorological Institute, P.O.Box 503, FI-00101, Helsinki, Finland
4Leibniz Institute for Tropospheric Research, Permoserstrasse 15, D-04318, Leipzig, Germany
5Gwangju Institute of Science and Technology, Korea
6now at: Science and Systems Applications, Inc. NASA Langley Research Center, Hampton VA, USA
7The Energy and Resource Institute, Darbari Seth Block, IHC Complex, Lodhi Road, 110 003, New Delhi, India
8University of Eastern Finland, Department of Applied Physics, P.O.Box 1627, FI-70211, Kuopio, Finland In this study we present multi-wavelength lidar observations which were carried out in Northern India on 13th of July 2008. We have analyzed lidar profiles in regard to geometrical features, optical and microphysical properties of well-defined aerosol layers. Particle optical depths of 0.53 and 0.37 were measured for heights above 1 km at 355 and 532 nm, respectively. Above the polluted marine boundary layer, lofted plumes were found up to 4 km height. The lidar ratio was between 45 and 70 sr at 355 nm.
The Ångström exponent related to backscatter (355/532 nm) ranged from 1 to 1.6. Effective particle radii ranged between 0.2 and 0.35 µm for pollution plumes above 1.5 km height. Larger particles are observed below 1.5 km, with particle effective radii ranging between 0.4 and 0.5 µm, possibly due to the contribution of maritime aerosols. The single-scattering albedo at 532 nm ranged from 0.78±0.12 to 0.87±
0.15 for the atmospheric layers above 1.5 km, while larger values of 0.95±0.07 and 0.99±0.02 were found for the lower atmospheric layers.
NON-SPHERICAL PARTICLES OPTICAL PROPERTIES USING SCATTERING MATRIX AND POLARIZATION LIDAR
Grégory David, Benjamin Thomas, Alain Miefre and Patrick Rairoux
Laboratoire de Spectrométrie Ionique et Moléculaire, CNRS, UMR 5579 Université Lyon 1, 10 rue Ada Byron, 69622 Villeurbanne, France
Non-spherical particles, such as volcanic ash or desert dust particles play a key role in the Earth’s climate.
After long-range transport from a source region, these particles are highly dispersed and aged and the aerosol cloud (a) is a mixture of both spherical (s) and non-spherical (ns) particles. In this contribution, we address the non-spherical particles content in the low troposphere after long-range transport, by combining scattering matrix formalism with a sensitive and accurate UV-polarization lidar experiment. The scattering matrix formalism, suitable for both s and nsparticles, has been developed for a mixed aerosol cloud (a) = {s, ns}. It is shown that this formalism allows interpreting the observed Lidar polarization vertical profiles at Lyon (France). We then propose a new methodology to remotely evaluate the ns-particles number concentration in the troposphere. Two case studies of long-range transport are analyzed: on volcanic ash particles (released from the Eyjafjallajökull 2010 eruption) and on desert dust particles (originating from a July 2010 dust episode). We believe his methodology to be robust, easily applicable and nsparticles specific, which is new.
S3O-17
HIGH SPECTRAL RESOLUTION LIDAR DEVELOPMENTS AND APPLICATIONS AT NASA LANGLEY RESEARCH CENTER
Chris A. Hostetler1, Richard A. Ferrare1, Johnathan W. Hair1, Anthony L. Cook1, David B. Harper1, Terry Mack2, Craig S. Cleckner1, Sharon P. Burton1, Raymond R. Rogers1, Michael D. Obland1,
Richard J. Hare1, Amy Jo Scarino3, Carolyn Butler3, Yongxiang Hu1, Detlef Müller3, Eduard Chemyakin4, Dong Liu4
1NASA Langley Research Center, MS 420, Hampton, VA 23681, USA
2Lockheed-Martin, NASA Langley Research Center, Hampton, VA 23681, USA
3Science Systems and Applications, Inc., 1 Enterprise Parkway, Suite 200, Hampton, VA 23666, USA
4Oak Ridge Associated Universities (ORAU), NASA Langley Research Center Hampton, VA 23681,USA Our group at NASA Langley Research Center (LaRC) has been engaged in the development and deployment of High Spectral Resolution Lidar (HSRL) instruments and advancing HSRL science applications. We completed our first instrument, referred to as HSRL-1, in 2004 and have deployed it on the LaRC King Air aircraft on 18 field campaigns starting in 2006. These campaigns have focused on aerosol and aerosol-cloud process studies, air quality studies, and satellite instrument validation. We are currently modifying HSRL-1 to enable ocean profiling in addition to the atmospheric measurements. Our team is also developing a more advanced instrument, referred to as HSRL-2, which is designed to be a prototype for the lidar planned for NASA’s Aerosol-Clouds-Ecosystems (ACE) mission. In this paper, we discuss both airborne instruments, some of the many applications of the data products, and our future plans for airborne and spaceborne lidar applications.
S3O-18
AIRBORNE AND GROUND MEASUREMENTS WITH A HIGH SPECTRAL RESOLUTION LIDAR
Bruce Morley1, Scott M. Spuler1, I. A. Razenkov2,3, Jothiram Vivekanandan1, Edwin W. Eloranta2
1National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO, USA
2University of Wisconsin, 1225 W. Dayton St., Madison, WI, USA
3Wave Propagation Lab, Institute of Atmospheric Optics, Tomsk, Russia
A high spectral resolution lidar (HSRL) has been built by the University of Wisconsin-Madison (UW) for the National Center for Atmospheric Research (NCAR) Gulfstream-V (GV) aircraft-GVHSRL. The instrument was test flown in February 2010 and operated from a customized intermodal container (6.1 m) beginning in September 2010. We will present GVHSRL ground-based data taken from this container located near NCAR’s Foothills laboratory complex. The first airborne deployment of GVHSRL was on the Tropical Ocean tRoposphere Exchange of Reactive halogen species and Oxygenated VOC project (TORERO) in January and February of 2012. We will also present data examples taken during this field program.
S3O-19
DISCOVER-AQ: DETERMINING THE RELATIONSHIP BETWEEN SATELLITE RETRIEVED COLUMN AOD, EXTINCTION PROFILES, AND SURFACE PM2.5
Raymond M. Hoff1, Timothy Berkoff1, Ruben Delgado1, Patricia Sawamura1, Richard Ferrare2, John Hair2, Chris Hostetler2, Ray Rogers2, Mike Obland2, Bruce Anderson2, James Crawford2, and
Brent Holben3
1Physics Department and Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
2NASA Langley Research Center, Hampton VA 23681-2199, USA
3 Goddard Space Flight Center, Greenbelt MD 20771, USA
The Deriving Information on Surface Conditions from COlumn and VERtically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) Mission is a five-year multisite experiment to better understand the relationship between satellite measured variables (columnar) with surface concentrations, required for air quality assessment and regulation. The first DISCOVER-AQ experiment was held in the Baltimore-Washington urban corridor during July 2011 and involved fourteen lidars and two aircraft to provide the vertical profiles needed to close the vertical column with surface measurements. As of December 2011, DISCOVER-AQ data is now available to the public for analysis. Here we briefly sketch principal findings from the HSRL and ground-lidar contribution to the experiment in the generation of spatially and temporally varied: extinction profiles, detection of PBL heights, and closure on surface PM2.5. In twelve days of coincident lidar and aircraft profiles, HSRL and ground-lidar extinction profiles agreed within the error estimates of the two methods. Multiple types of Micropulse Lidars (MPL) and UMBC’s elastic lidar system (ELF) provided extinction profiles, based on column closure to coincident AOD from sunphotometer and a constant lidar ratio. The spatially distributed lidars showed variability in the PBL height across this complex urban-estuarine environment that was modified by bay-breeze circulations.
Simone Lolli, Sheng-Hsiang Wang, Ellsworth Judd Welton, James Campbell, Brent Holben
1UMBC-NASA Goddard Space Flight Center, Greenbelt 20771, MD, USA
2NASA, Goddard Space Flight Center, Greenbelt, MD, USA
3Department of Atmospheric Sciences, National Central University, Chung-Li, Taiwan
4U. S. Naval Research Laboratory, Monterey, CA, USA
Measurements of aerosol particle optical properties and cloud vertical distributions were collected at Dongsha Island (20°42'52" N, 116°43'51" E) in the northern South China Sea (SCS) during spring 2010 with an autonomous and continuously running 0.355 um polarization lidar. The measurements, together with backward trajectories analysis depict simultaneous near-surface aerosol particle transport and the emergence a significant elevated layer (3-4 km) caused by upwind biomass burning on 22-23 March. Our results help characterize how springtime emissions from both China and Southeast Asia impact aerosol loading and optical properties over the northern SCS. Also the complex vertical distribution of aerosol particles, and their interaction with clouds, has implications for remote-sensing observations and aerosol/cloud radiation processes. This study is conducted as part of the 7SEAS (the Seven South East Asian Studies) project, focused on characterizing aerosol source origins, transport processes, and vertical distributions of Asian continental outflow in South East Asia. Moreover, the paper represents a preliminary effort of the NASA MPLNET team for integrating a commercial UV Lidar and its datasets as part of the global federated instrument network.
S3O-21
DUST AEROSOL PROFILING BY GROUND-BASED AND AIRBORNE LIDAR IN THE FRAMEWORK OF FENNEC
Patrick Chazette1, Cyrille Flamant2, Philippe Royer1,3, Fabien Marnas1,2, Cécile Kocha2, Pascal Genau2, Pascal Doira1, Diduer Bruneau2, Jacques Pelon2, Joseph Sanak1
1Laboratoire des Sciences du Climat et de l’Environnement, CEA-CNRS-UVSQ, 91191 Gif-sur-Yvette Cedex, France
2Laboratoire Atmosphères Milieux Observations Spatiales (LATMOS), Laboratoire mixte CNRS-UVSQ-UPMC, UMR 8190, Université Paris 6, 4 Place Jussieu, 75252 Paris, France
3Leosphere, 76 rue Monceau, 75008 Paris, France
The FENNEC program aims to improve our knowledge of both the role of the Saharan Heat Low (SHL) on the West African monsoon and the interactions between the African continent and the Mediterranean basin through the Saharan dust transport. The Saharan desert is the major source of mineral dust in the world and may significantly impact the air quality over the Western Europe by increasing the particular matter content. Two lidar systems were operated by the French component of the FENNEC project: an airborne lidar which was flown aboard the French Falcon 20 research aircraft and a ground-based lidar which was located in the southeastern part of Spain, close to Marbella. A major dust plume originating from multiple emission sources (Mauritania, Morocco, and Algeria) and ultimately transported over southern Spain at the end of June 2011 was observed by the two systems.
S3O-22
OPTICAL PROPERTIES OF UNUSUALLY DENSE MINERAL DUST OUTBREAKS OVER KOREA OBSERVED WITH
MULTIWAVELENGTH/AEROSOL/DEPOLARIZATION/RAMAN-QUARTZ LIDAR
Boyan Tatarov1, Detlef Müller1,2, Youngmin Noh1, Dong-Ho Shin1, Sung-Kyun Shin1, Young Joon Kim1
1Atmospheric Remote Sensing Laboratory, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-Gu, Gwangju 500-712, Republic of Korea
2Leibniz Institute for Tropospheric Research, Permoser Str. 15, 04318 Leipzig, Germany
We report on two strong events of transport of mineral dust from Central Asia across Korea. The events took place in March and November 2010. According to measurements of PM10 at the ground these events present the strongest cases of dust transport over Korean in the past years. PM10 concentrations exceed 1mg/m3. The event in November is particularly important as fall is not a typical time for strong events of dust transport which usually occurs in springtime. We observed these dust events with a multiwavelength aerosol/depolarization/Raman quartz lidar.
S3O-23
GLOBAL SCALE LIDAR RATIO RETRIEVAL OVER THE OCEAN
Damien Josset1, Jacques Pelon2, Yongxiang Hu3, Raymond Rogers3, Zhaoyan Liu1, Ali Omar3, Mark Vaughan3, Peng-Wang Zhai1, and the ICARE team4
1Science Systems and Applications, Inc, 1 Entreprise Parkway Suite 200, Hampton, VA 23681, USA
2Université Pierre et Marie Curie, CNRS, IPSL, LATMOS, Paris, France
3NASA Langley Research Center, MS 475, Hampton VA USA 23681-2199
4ICARE-Université Lille 1, Lille, France
In this paper we discuss global scale lidar ratio retrieval over the ocean as derived by the Synergized Optical Depth of Aerosols (SODA) algorithm (based on CALIPSO/CloudSat ocean surface echo) and comparisons with CALIOP V3 lidar ratio for marine aerosols, dusts and cirrus clouds. As expected, the signatures vary as a function of the feature type. We show that the SODA lidar ratio at 532 nm is in relatively good agreement with what is currently used in CALIOP operational product. The lidar ratio at
In this paper we discuss global scale lidar ratio retrieval over the ocean as derived by the Synergized Optical Depth of Aerosols (SODA) algorithm (based on CALIPSO/CloudSat ocean surface echo) and comparisons with CALIOP V3 lidar ratio for marine aerosols, dusts and cirrus clouds. As expected, the signatures vary as a function of the feature type. We show that the SODA lidar ratio at 532 nm is in relatively good agreement with what is currently used in CALIOP operational product. The lidar ratio at